The 16mm R/H Mechanical Seal Semi-Cartridge is specifically designed for use in Grundfos CR, CRI, and CRIE pumps. This seal ensures a secure and reliable connection between the pump shaft and the pump body, preventing leakage and ensuring smooth operation. With a shaft size of 16mm, this seal is compatible with a range of pump models and is a crucial component for maintaining the performance and efficiency of the pump system.